Metal detector



FIG. 1 is a front perspective view of the metal detectoir, with broken lining showing functional elements that are not considered part of the design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a rear elevation thereof; and,

FIG. 8 is a front elevation view thereof. 

CLAIM The ornamental design for a metal detector, as shown and described. 